Vintage Alcohol Lamp ? Solid Brass Cap with Spring

Vintage Brass Alcohol Lamp - solid brass top / cap, when you press on the tip, w the wick would extend, that part goes down, when pressure is released it pops back up, a spring is enclosed in that portion of the top, looks like a leather washer is also in that space, last picture shows a close-up of the top. I am not sure how this works, or even if it is an alcohol lamp, the cap is solid at the end, the wick does not go down into the funt part, unless the alcohol is drawn up when you press down (?), I need some help with this item... Base measures 3 1/2" in diameter, stands 5 3/4" high, made well and in very good condition. I had to clean this up, because it was spattered with paint, the base still has a bit of the red pigment. Please feel free to e-mail if you have any questions. Buyer pays exact shipping cost, no handling fees. Always happy to combine on shipping. New York State residents to please include Sales Tax or Resale Number - Thank you.